Freon Pressure Gauge (Refrigerant)

Features: 1) Size: 2 1/2" (63mm)2) Case: blue for low pressure, red for high pressure 3) Vibration free (flutter-less) movement, color coded scale andrecalibration screw 4) Pressure range:a) 0 to 500PSI for red gaugeb) -30HG-0-250psi( 120-250psi retard) for blue gaugec) Other pressure range available 5) Socket: Brass LM 6) Connection thread: 1/8" NPT, BSP, BSPT, PT, ZG, and other specialspecification avaliable 7) Bourdon tube: copper alloy8) Case: steel or plastic case 9) Window (lens): screwed-on plastic lens10) Dial plate with ALF logo or customer logo11) Accuracy: +/- 3/2/3% of full scale (ASME B40.1 Grade B)12) Ambient temperature: -40 to 60 Degrees centigrade